From 31f81f38affecb3f90659eb9d34df68a11a62035 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 19 Nov 2025 15:16:18 +0000
Subject: [PATCH] Fix null reference exception in UnpackV1.Unpack.Dispose()

Co-authored-by: adamhathcock <527620+adamhathcock@users.noreply.github.com>
---
 src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
index f59fed9e..1518830a 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
@@ -27,7 +27,7 @@ internal sealed partial class Unpack : BitInput, IRarUnpack
         if (!disposed)
         {
             base.Dispose();
-            if (!externalWindow)
+            if (!externalWindow && window is not null)
             {
                 ArrayPool<byte>.Shared.Return(window);
                 window = null;